Funding for this research was provided by:
the Ministry of Health, Labour and Welfare, Japan
Ministry of Education, Culture, Sports, Science and Technology, Japan
the Japan Agency for Medical Research and Development
Article History
Received: 24 July 2017
Accepted: 18 December 2018
First Online: 8 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The Institutional Review Board at The University of Tokyo approved the study protocol.
: Informed consent was waived because of the anonymous nature of the data.